Phosphorus deficiency..?

I keep getting a few leaves like this on my Power Africa plant that I’m looking at flowering in the next week or so.. a couple every day. Does it look like phosphorus deficiency to you guys..? The plant is in a 6” rockwool block that has been transplanted into a pot of coco after I decided to keep her for a Mom a while ago.. I’d be stoked with advice on what it might be an a course of action..

Phosphorus can look like that, Blueish dark spots, You may be on the right track.
Give her a full dose of nutes, and give her a few days. I believe she will be just fine.

How old is this plant?

Phosporous def would be on my short list...but if it's not already flowering, I would be a little surprised that you're seeing it without there being some other variable at the root of the problem...Whats the age of the plant?...How heavy and frequently are you feeding?...Etc etc.

Thanks for the response guys. This plant is about 3 months old, I’ve taken a good deal of clones off of her already. I’m feeding her GH line Lucas method at around 0.7EC 5.8PH. I’m not too clued up on Coco but she dries out daily in the current pot so I’m looking at transplanting her into a 5 Gallon pot today which is double the current size. Maybe she’s just a heavy feeder? Should I maybe just feed her with GH Bloom for a while? My plan is to take a couple cuts and then flower her with my next run along with two other Moms that I’m going to be doing the same with as I have some space and a light available. As you can see in the pic it just seems to be a couple of the lower fan leaves at a time, the rest looks fine and she’s growing fairly vigorously..

http://www.canna.com.au/growing_on_coco_busting_the_myth

I've never grown in coco, just DWC, so it may be difficult for me to give specific advice here. But I do know that the Lucas Formula is already pretty heavy in Phosphorous, so you can try adding a bit of extra phosphorous, and if the issue worsens then you know that it's definitely not the core of the issue. I'm sure it's possible that she's just extra hungry. People always flip shit when they hear how high of nutrient level I run in my solution lol.